Compare

Cold drink (cola/soda, regular) vs Diet / zero-sugar cola

Gram for calorie, Cold drink (cola/soda, regular) carries more protein per kcal than Diet / zero-sugar cola — 0 g protein for 106 kcal against 0 g for 0 kcal. For fat loss the two are close enough on protein density that either works — the deciding factor is what fits your calorie budget. For muscle gain the two deliver essentially the same protein per serving, so pick whichever you'll actually eat consistently. Neither is "bad" — Cold drink (cola/soda, regular) is a beverage item and Diet / zero-sugar cola is a beverage item, so the honest answer is usually "both, on different days," not a single winner.

106Cold drink kcal
  • 0Diet kcal
  • 0gCold drink protein
  • 0gDiet protein

Side by side

MetricCold drink (cola/soda, regular)Diet / zero-sugar cola
Serving1 bottle/can (250 ml)1 can (300 ml)
Calories1060
Protein g00
Carbs g26.50
Fat g00
Cost per serving2040
Best for muscle gain
Best for fat loss

Questions people ask

Which has more protein, Cold drink (cola/soda, regular) or Diet / zero-sugar cola?
Cold drink (cola/soda, regular) has 0 g protein per serving; Diet / zero-sugar cola has 0 g. They're essentially tied.
Which is better for fat loss?
Both carry a similar amount of protein per calorie, so the choice comes down to your total calorie budget and what keeps you full.
Which is cheaper per gram of protein?
Cost-per-protein is close enough between the two that price shouldn't be the deciding factor — pick based on taste and what fits your meals.